 /*******************************************************************************
  * Copyright (c) 2006, 2007 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.core.internal.databinding.observable.tree;

 /**
  * Request monitor used to collect the number of children for an element in a lazy
  * observable tree.
  *
  * @since 3.3
  */
 public interface IChildrenCountUpdate extends IViewerUpdate {

     /**
      * Returns the parent elements that children counts have been requested for
      * as tree paths. An empty path identifies the root element.
      *
      * @return parent elements as tree paths
      */
     public TreePath[] getParents();

     /**
      * Sets the number of children for the given parent.
      *
      * @param parentPath
      * parent element or empty path for root element
      * @param numChildren
      * number of children
      */
     public void setChildCount(TreePath parentPath, int numChildren);
 }

